Injury concerns for the offensive line grab the most attention at Wednesday’s Seahawks practice in Renton. Pro bowl left tackle Russell Okung is already out with a torn big toe ligament. Coach Pete Carroll now revealed right tackle Breno Giacomini is dealing with a sore knee.

Giacomini, defensive lineman Red Bryant (back), and receiver Jermaine Kearse,(sprained ankle) were all held out of today’s work outs as a precaution. Carroll is hopeful Bryant and Kearse can participate in the drills Thursday.

Rookies Alvin Bailey and Michael Bowie both saw game action last Sunday against Jacksonville, and according to offensive line coach Tom Cable, performed well. Bowie might be asked to start at right tackle if Giacomini can’t go. Seattle blockers already know they must deal with the best defensive lineman in the game, Houston’s J.J. Watt.

Seattle acquired some offensive line help today by signing Jason Spitz, a center/guard who played for Jacksonville last season, and was with Green Bay to start his NFL career.

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The Seahawks have plenty of incentives for Sunday’s game in Houston. They would like to beat a quality opponent in a challenging road atmosphere. A victory would also give Seattle its first 4-and-0 start in franchise history.

Defensive end Cliff Avril was asked about the possible milestone.

“It would be great, you know I’ve never been on a team that was 3-and-0”, Avril laughed. “It would be great to be 4-and-0. It would show the type of team we are and how mature we’ve become.”

Seattle’s other pass rush threat Michael Bennett is anxious to play in Houston. Having played at Texas A & M, Bennett says he will have to come up with more than 30 tickets for family and friends watching him play.

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The Seahawks might catch a break. Houston’s all world receiver Andre Johnson is dealing with a painful bruised shin. Coach Gary Kubiak said after Texan’s practice it might come down to a game time decision for Johnson.